arm64: dts: ti: k3-am69-sk: Enable camera peripherals

CSI cameras are controlled using I2C. On AM69 Starter Kit, this is routed
to I2C-1, so enable the instance, TCA9543 I2C switch and the TCA6408
GPIO expander on the bus. AM69 SK has the CSI2RX routed to a MIPI CSI
connector and to 22-pin RPi camera connector through an analog mux with
GPIO control, model that so that an overlay can control the mux state
according to connected cameras.

AM69 SK schematics: https://www.ti.com/lit/zip/sprr466

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Reviewed-by: Jai Luthra <j-luthra@ti.com>
Link: https://lore.kernel.org/r/20240215085518.552692-5-vaishnav.a@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
index 475bcec99bd69f07d65378eb7cb5b34b8622fb70..aa770e82de2700df9556b16178882a39a2f8b425 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
@@ -322,6 +322,14 @@
                        };
                };
        };
+
+       csi_mux: mux-controller {
+               compatible = "gpio-mux";
+               #mux-state-cells = <1>;
+               mux-gpios = <&exp2 1 GPIO_ACTIVE_HIGH>;
+               idle-state = <0>;
+       };
+
 };
 
 &main_pmx0 {
@@ -341,6 +349,13 @@
                >;
        };
 
+       main_i2c1_pins_default: main-i2c1-default-pins {
+               pinctrl-single,pins = <
+                       J784S4_IOPAD(0x0ac, PIN_INPUT_PULLUP, 13) /* (AE34) MCASP0_AXR15.I2C1_SCL */
+                       J784S4_IOPAD(0x0b0, PIN_INPUT_PULLUP, 13) /* (AL33) MCASP1_AXR3.I2C1_SDA */
+               >;
+       };
+
        main_mmc1_pins_default: main-mmc1-default-pins {
                bootph-all;
                pinctrl-single,pins = <
@@ -775,6 +790,42 @@
        };
 };
 
+&main_i2c1 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_i2c1_pins_default>;
+       clock-frequency = <400000>;
+       status = "okay";
+
+       exp2: gpio@21 {
+               compatible = "ti,tca6408";
+               reg = <0x21>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               gpio-line-names = "CSI_VIO_SEL", "CSI_MUX_SEL_2", "CSI2_RSTz",
+                                 "IO_EXP_CAM0_GPIO1", "IO_EXP_CAM1_GPIO1";
+       };
+
+       i2c-mux@70 {
+               compatible = "nxp,pca9543";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               reg = <0x70>;
+
+               cam0_i2c: i2c@0 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       reg = <0>;
+               };
+
+               cam1_i2c: i2c@1 {
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+                       reg = <1>;
+               };
+
+       };
+};
+
 &main_sdhci0 {
        bootph-all;
        /* eMMC */